Party etiquette - what would you do?

[dollym1x]

My daughter is having her 8th birthday party soon. We were going to invite all the girls in her class (bar one who didn't go to the last 2 parties we invited her to bc she's not there on the weekend), but this morning my daughter found out she hadn't been invited to another little girl in her friendship groups party - the other girls were all excitedly talking about it this morning, that's how we found out (other girls party is this afternoon).
Now this party I'm organising for my daughter is fairly expensive per head, I'm going to ask my daughter what she thinks tonight, but now I'm thinking of also not inviting this other girl.
Am I being petty 😂 We invited this girl to my daughters party this time last year & she showed, and they are in the same friendship group.
What would you do?

My daughters party wont be for another month yet.

She sounds like a great girl OP.

I can certainly understand why you would be miffed she was left out of a friendship group of 7 from her class.
I think it would be a bit strange if you weren't wondering.

As the years go on there tend to be smaller parties and you get to know who your real buddies are from them.